Fhex - A Full-Featured HexEditor

This project is born with the aim to develop a lightweight, but useful tool. The reason is that the existing hex editors have some different limitations (e.g. too many dependencies, missing hex coloring features, etc.).

This project is based on qhexedit2. New features should be added in the future, PRs are welcomed.

Features

• Search and replace (UTF-8, HEX, regex, inverse search supported) [CTRL + F]
• Colored output (white spaces, ASCII characters, 0xFF, UTF-8 and NULL bytes have different colors)
• Interpret selected bytes as integer, long, unsigned long [CTRL + B]
• Copy & Paste [CTRL + C and CTRL + V]
• Copy selected unicode characters [CTRL + Space]
• Zeroing all the selected bytes [CTRL + D]
• Undo & Redo [CTRL + Z and CTRL + Y]
• Find & Replace
• Drag & Drop (Hint: Drag&Dropping two files the editor will diff them)
• Overwrite the same file or create a new one [CTRL + S]
• Big files supported (Only on Linux, Windows has still several limitations on the supported file size)
• Goto offset [CTRL + G]
• Insert mode supported in order to insert new bytes instead to overwrite the existing one [INS]
• Create new instances [CTRL + N]
• Basic text viewer for the selected text [CTRL + T]
• Reload the current file [F5]
• Compare two different files at byte level
• Browsable Binary Chart (see later for details) [F1]
• Hex - Dec number converter [F2]
• Hex String escaper (e.g from 010203 to \x01\x02\x03) [F3]
• Pattern Matching Engine (see later for details)
• Shortcuts for all these features

Pattern Matching Engine

Fhex can read a configuration file (from ~/fhex/config.json) in JSON format with a list of regex to highlight and a comment/label to add close to the matches.

Example that highlights urls with a basic regex and emails:

{
    "PatternMatching":
    [
        {
            "regex" : "www.[a-zA-Z0-9].",
            "color" : "rgba(250,200,200,50)",
            "message" : "Found url"
        },
        {
            "regex" : "[A-Z0-9_!#$%&'*+/=?`{|}~^.-]+@[A-Z0-9.-]+",
            "color" : "rgba(250,200,200,50)",
            "message" : "Found email address"
        }
    ]
}

To activate pattern matching press CTRL + P

Binary Chart

Fhex has the feature to chart the loaded binary file (Note: In order to compile the project, now you need also qt5-charts installed on the system). The y-axis range is between 0 and 255 (in hex 0x0 and 0xff, i.e. the byte values). The x-axis range is between 0 and the filesize.

The chart plots the byte values of the binary file and let you focus only on the relevant sections. For example, if in a binary file there is an area full of null bytes, you can easily detect it from the chart.

License

GPL-3